ATXMEGA128D4 datasheet(30/100 Pages) ATMEL

30 / 100 page

8135G–AVR–08/10

XMEGA D4

15. T/C - 16-bit Timer/Counter

15.1

Features

• Four 16-bit Timer/Counters

– Three Timer/Counters of type 0

– One Timer/Counters of type 1

• Three Compare or Capture (CC) Channels in Timer/Counter 0

• Two Compare or Capture (CC) Channels in Timer/Counter 1

• Double Buffered Timer Period Setting

• Double Buffered Compare or Capture Channels

• Waveform Generation:

– Single Slope Pulse Width Modulation

– Dual Slope Pulse Width Modulation

– Frequency Generation

• Input Capture:

– Input Capture with Noise Cancelling

– Frequency capture

– Pulse width capture

– 32-bit input capture

• Event Counter with Direction Control

• Timer Overflow and Timer Error Interrupts and Events

• One Compare Match or Capture Interrupt and Event per CC Channel

• Hi-Resolution Extension (Hi-Res)

• Advanced Waveform Extension (AWEX)

15.2

Overview

XMEGA D4 has four Timer/Counters, three Timer/Counter 0 and one Timer/Counter 1. The dif-

ference between them is that Timer/Counter 0 has four Compare/Capture channels, while

Timer/Counter 1 has two Compare/Capture channels.

The Timer/Counters (T/C) are 16-bit and can count any clock, event or external input in the

microcontroller. A programmable prescaler is available to get a useful T/C resolution. Updates of

Timer and Compare registers are double buffered to ensure glitch free operation. Single slope

PWM, dual slope PWM and frequency generation waveforms can be generated using the Com-

pare Channels.

Through the Event System, any input pin or event in the microcontroller can be used to trigger

input capture, hence no dedicated pins are required for this. The input capture has a noise can-

celler to avoid incorrect capture of the T/C, and can be used to do frequency and pulse width

measurements.

A wide range of interrupt or event sources are available, including T/C Overflow, Compare

match and Capture for each Compare/Capture channel in the T/C.

PORTC has one Timer/Counter 0 and one Timer/Counter1. PORTD and PORTE each have one

Timer/Conter0. Notation of these are TCC0 (Time/Counter C0), TCC1, TCD0 and TCE0,

respectively.

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